BUGZILLA: Default no auto-mail for CC: changes

[Wolfgang Bangerth]

Since you ask: I for one certainly do not want mail if something changes 
in any bug report which I ever touched. That would get me mail for almost 
all PRs in the database ;-)

I want emails, if I have explicitly added myself to the CC: list. It seems 
as if presently everyone who has ever changed something in a PR is in the 
CC list.

W.

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Wolfgang Bangerth              email:            bangerth@ices.utexas.edu
                               www: http://www.ices.utexas.edu/~bangerth/